DP Chemistry (last assessment 2024)

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Question 17N.2.sl.TZ0.a

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Date November 2017 Marks available [Maximum mark: 2] Reference code 17N.2.sl.TZ0.a
Level sl Paper 2 Time zone TZ0
Command term Explain Question number a Adapted from N/A
a.
[Maximum mark: 2]
17N.2.sl.TZ0.a

Trends in physical and chemical properties are useful to chemists.

Explain the general increasing trend in the first ionization energies of the period 3 elements, Na to Ar.

[2]

Markscheme

increasing number of protons

OR

increasing nuclear charge

«atomic» radius/size decreases

OR

same number of shells

OR

similar shielding «by inner electrons»

«greater energy needed to overcome increased attraction between nucleus and electrons»

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